Improvement in thill-couplings



D. R. SILVER. Thill-Ooupling. -No. 196,601 Patented Oct. 30, 1877.

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UNITED STATES PATENT OFFICE.

DAVID R. SILVER, OF SIDNEY, OHIO.

IMPROVEMENT IN THlLL-COUPLINGS.

Specification forming part of Letters Patent No. 196,601, dated October30, 1877; application filed August 24, 1877.

To all whom it may concern:

Be it known that I, DAVID R. SILVER, of Sidney, in the county of Shelbyand State of Ohio, have invented a new and useful Improvement in ThillOouplings, of which the following is a specification:

Figure 1 is a topview of my improved thillcoupling, part of the clipbeing broken away to show the construction. Fig. 2 is a side view of thesame, partly in section, through the line as m, Fig. 1, to show theconstruction.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved thill-couplingwhich shall be so constructed as to have the least possible amount ofwear, to enable the wear to be readily taken up, and to preventrattling, which shall be simple in construction and convenient in use,enabling the thills to be readily and quickly attached and detached, andwhich shall not be liable to become accidentally detached.

The invention will first be described in connection with the drawing,and then pointed out in the claim.

A is the thill-iron, the rear end of which is made wide, and has asemicircular hole or eye formed in it, with the end bar rounded off toform the pivot. The bar or pivot of the thilliron eye is placed in ahole. formed by two half-round cross-grooves made in the adjacent facesof the bars B G. The lower bar B is the forward extension of the yoke Dof .the axleclip E. The rear end of the upper bar 0 is notched toreceive the forward arm of the clip E, and fit beneath a shoulder formedupon said arm.

In the forward end of the bar 0 is formed a round hole, and in theforward end of the bar B is formed a screw-hole to receive the bolt F,which is made with a square head to enable it to be conveniently turnedin and out with a wrench.

The eye of the thill-iron A is made large enough to enable it to receivethe ends of the bars B C, and allow the thills to play up and down.

With this construction there will be the least possible amount offriction, and consequent wear, and the wear may be taken up by a washerof leather or other suitable material interposed between the bar of thethill-iron A and one of the bars B G, and kept in place by being clampedbetween the said bars B C.

With this construction the thills can be detached by simply removing onebolt F from each coupling.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with a grooved bar, 0, held at oneend by a detachable screw, of the yoke D, extended to form the part B,and the clip E, having a shoulder, under which the free end of part 0 isrigidly held, as shown and described.

DAVID ROBISON SILVER. Witnesses:

L. O. BARKDALE, S. J. HATFIELD.

